[llvm] r295470 - [X86][BMI] Add BMI2 stack folding tests

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Fri Feb 17 12:00:43 2017
New Revision: 295470

URL: http://llvm.org/viewvc/llvm-project?rev=295470&view=rev
Log:
[X86][BMI] Add BMI2 stack folding tests

Added:
    llvm/trunk/test/CodeGen/X86/stack-folding-bmi2.ll

Added: llvm/trunk/test/CodeGen/X86/stack-folding-bmi2.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/stack-folding-bmi2.ll?rev=295470&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/X86/stack-folding-bmi2.ll (added)
+++ llvm/trunk/test/CodeGen/X86/stack-folding-bmi2.ll Fri Feb 17 12:00:43 2017
@@ -0,0 +1,77 @@
+; RUN: llc -O3 -disable-peephole -mtriple=x86_64-unknown-unknown -mattr=+bmi,+bmi2 < %s | FileCheck %s
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-unknown"
+
+; Stack reload folding tests.
+;
+; By including a nop call with sideeffects we can force a partial register spill of the
+; relevant registers and check that the reload is correctly folded into the instruction.
+
+define i32 @stack_fold_bzhi_u32(i32 %a0, i32 %a1)   {
+  ;CHECK-LABEL: stack_fold_bzhi_u32
+  ;CHECK:       bzhil %eax, {{-?[0-9]*}}(%rsp), %eax {{.*#+}} 4-byte Folded Reload
+  %1 = tail call i32 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
+  %2 = tail call i32 @llvm.x86.bmi.bzhi.32(i32 %a0, i32 %a1)
+  ret i32 %2
+}
+declare i32 @llvm.x86.bmi.bzhi.32(i32, i32)
+
+define i64 @stack_fold_bzhi_u64(i64 %a0, i64 %a1)   {
+  ;CHECK-LABEL: stack_fold_bzhi_u64
+  ;CHECK:       bzhiq %rax, {{-?[0-9]*}}(%rsp), %rax {{.*#+}} 8-byte Folded Reload
+  %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
+  %2 = tail call i64 @llvm.x86.bmi.bzhi.64(i64 %a0, i64 %a1)
+  ret i64 %2
+}
+declare i64 @llvm.x86.bmi.bzhi.64(i64, i64)
+
+define i64 @stack_fold_mulx_u64(i64 %a0, i64 %a1, i64 *%a2)   {
+  ;CHECK-LABEL: stack_fold_mulx_u64
+  ;CHECK:       mulxq {{-?[0-9]*}}(%rsp), %rax, %rcx {{.*#+}} 8-byte Folded Reload
+  %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
+  %2 = zext i64 %a0 to i128
+  %3 = zext i64 %a1 to i128
+  %4 = mul i128 %2, %3
+  %5 = lshr i128 %4, 64
+  %6 = trunc i128 %4 to i64
+  %7 = trunc i128 %5 to i64
+  store i64 %7, i64 *%a2
+  ret i64 %6
+}
+
+define i32 @stack_fold_pdep_u32(i32 %a0, i32 %a1)   {
+  ;CHECK-LABEL: stack_fold_pdep_u32
+  ;CHECK:       pdepl {{-?[0-9]*}}(%rsp), %eax, %eax {{.*#+}} 4-byte Folded Reload
+  %1 = tail call i32 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
+  %2 = tail call i32 @llvm.x86.bmi.pdep.32(i32 %a0, i32 %a1)
+  ret i32 %2
+}
+declare i32 @llvm.x86.bmi.pdep.32(i32, i32)
+
+define i64 @stack_fold_pdep_u64(i64 %a0, i64 %a1)   {
+  ;CHECK-LABEL: stack_fold_pdep_u64
+  ;CHECK:       pdepq {{-?[0-9]*}}(%rsp), %rax, %rax {{.*#+}} 8-byte Folded Reload
+  %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
+  %2 = tail call i64 @llvm.x86.bmi.pdep.64(i64 %a0, i64 %a1)
+  ret i64 %2
+}
+declare i64 @llvm.x86.bmi.pdep.64(i64, i64)
+
+define i32 @stack_fold_pext_u32(i32 %a0, i32 %a1)   {
+  ;CHECK-LABEL: stack_fold_pext_u32
+  ;CHECK:       pextl {{-?[0-9]*}}(%rsp), %eax, %eax {{.*#+}} 4-byte Folded Reload
+  %1 = tail call i32 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
+  %2 = tail call i32 @llvm.x86.bmi.pext.32(i32 %a0, i32 %a1)
+  ret i32 %2
+}
+declare i32 @llvm.x86.bmi.pext.32(i32, i32)
+
+define i64 @stack_fold_pext_u64(i64 %a0, i64 %a1)   {
+  ;CHECK-LABEL: stack_fold_pext_u64
+  ;CHECK:       pextq {{-?[0-9]*}}(%rsp), %rax, %rax {{.*#+}} 8-byte Folded Reload
+  %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
+  %2 = tail call i64 @llvm.x86.bmi.pext.64(i64 %a0, i64 %a1)
+  ret i64 %2
+}
+declare i64 @llvm.x86.bmi.pext.64(i64, i64)